try resizing the cases and then putting them through the gauge. You may have fine luck with your gun with cases that don't go through the gauge. You can try a drop test on your rounds to see if they drop into your barrel easily even though they are slightly too big for the gauge, You might want to save rounds that either fit tightly or don't go through the gauge for slow fire or practice where you will not have issues with a refire if the round does not chamber correctly from the magazine. I have found new brass that has been through only my gun has no problem fitting through the gauge. Range brass tends to be a mized bag, If it has been through a gun that does not quite lock up as it fires it can create a slight bulge near the bottom of the case which will keep the fired brass from going through the gauge.
somethines this can be corrected by resizing in your reloader, other times it cannot if the brass is too bulged or you dont have your resizing die set to go all the way to the bottom of the case. Isabel

I do not believe the main purpose of the Martindale gauge is to weed out overly stressed brass. Who can tell that without an examination under an electron microscope? It is to weed out finished rounds that will not chamber correctly in your gun causing an alabi and also to weed out flaws in the reloading process (like you have failed to crimp the round) or brass that cannot be resized correctly that has a bulged base. I find it easier to sort before I reload and then resize anything that will not pass trough the gauge before I attemt to reload, It has saved a lot of work and expensive bullets, and primers that I don't want to have to extract from a bad case or worse lock my expensive wad gun up in the middle of a match. Isabel

I do not believe the main purpose of the Martindale gauge is to weed out overly stressed brass. Who can tell that without an examination under an electron microscope? It is to weed out finished rounds that will not chamber correctly in your gun causing an alabi and also to weed out flaws in the reloading process (like you have failed to crimp the round) or brass that cannot be resized correctly that has a bulged base. I find it easier to sort before I reload and then resize anything that will not pass trough the gauge before I attemt to reload, It has saved a lot of work and expensive bullets, and primers that I don't want to have to extract from a bad case or worse lock my expensive wad gun up in the middle of a match. Isabel

Negative. The purpose of the Martindale Gauge is to identify brass that has been overstressed and should not be reloaded.

Harvester, you can believe me or you can believe Govtmodel but if you believe him, let me send you my address so you can send me all of your brass that wont pass through the Martindale gauge before resizing. As long as it is not separting at the base it is all completely safe to shoot. I prefer Starline, Federal or Winchester. I will pay shipping and my friends and I will enjoy reloading it and shooting it, I know Bruce Martindale and last year at Camp Perry he was instructing Dr Nick of Mountain Competition pistols how to use his gauge on the firing line to weed out rounds that might not feed correctly into his gun. :-) Thanks in advance, Isabel

Harvester, you can believe me or you can believe Govtmodel but if you believe him, let me send you my address so you can send me all of your brass that wont pass through the Martindale gauge before resizing.

Don't believe me when you can believe Bruce himself! Here's an email exchange between Bruce and me from earlier today-

OK I'm back and dog is happy now. She wasn't going to take "wait" for an answer !

OP You didnt state the mode of failure; web yield or rim. Web yield is more serious and indicative of plastic pistol syndrome or seriously overstressed cases if from a 1911. I would chuck those, but thats your choice.

You can take your "failed" cases and set aside for practice and check them once again. Obviously, oversized rims aren't going to fix themselves but they may not necessarily jam in your gun, but then again, thats why the gauge is there.

Re the web yield, they might be on the edge and will pass if checked again after firing in your gun. If not, well, thats your choice too.

Gauge does not check for open crimps etc as a chamber does. By testing loaded ammo, you lose half the function of the gauge.

BTW, The only source of the gauge is from me. If you got one made somewhere else, I want to know about it please.

Re Dr Nick, He had an awful time last summer with both bulged and OS rim cases and every shell that jammed failed my gauge.

I recently received the guage from you Bruce. Read all the instructions many times. I have checked some of my old brass that I have loaded and shot probably 10 or more times. No issues as I have never had even a misfire or failure to load. Over 10K rounds in the last year. About half of this brass fails.

I also checked some once fired RP brass I use for competition. About half failed to go through the guage. I have a couple thousand once fired Federal that I will check next. No Glock brass.

I am getting quite a pile of brass that won't go through the guage. Some gets part way through and hangs up right where the case indents just above the rim. Some hang up on the rim. Some only go in far enough where the mouth of the case doesn't even clear the guage.

Now I worry about my brass and most of my shooting buddies are wanting me to give the brass to them. I have a Larry Leutenegger built .45 that shoots X ring so I'm concerned about hurting the gun.

Well this is interesting. I do maintain tight tolerances on the gauges and reject many as well. It is possible that your chamber falls on the larger side and the gauge on minimum side with nothing really wrong with either item.

I have had a couple people find chamber problems in the last ten tears of market use.

Did your sons RR ever have a reloading "adventure" (that he is aware of)?

His shells will work harder in the resizing/firing cycle and have more stress. Do they feel different in the sizer die compared to yours?

Some thing to try in his case (pardon the pun) is to resize and load his shells and then run them in the gauge. The mouth will definitely fit then but if there is bulge it will hang up. That tells you where the web region stands in accumulated stress. You can check the rims from either direction.

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